The biggest difference between the ball valve and the butterfly valve is that the opening and closing part of the butterfly valve is a plate, and the ball valve is a ball. The valve plate of the butterfly valve and the valve core of the ball valve all rotate around their axis; the valve plate of the gate valve is along the axis. For lifting movements; butterfly valve and gate valve can adjust the flow through the degree of opening; ball valve is not easy to do this.
Butterfly valves are characterized by fast opening and closing speed, simple structure and low cost, but their tightness and pressure bearing capacity are not good. The characteristics of a ball valve are similar to those of a gate valve, but it is difficult to achieve a large diameter because of limitations of volume and opening and closing resistance.
The structural principle of the butterfly valve is particularly suitable for making the butterfly plate of a large-diameter valve butterfly valve installed in the diameter direction of the pipe. In the cylindrical passage of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, the rotation angle is between 0° and 90°, and when the valve rotates to 90°, the valve is fully opened. Its structure is simple, low cost and large adjustable range. Ball valves are generally suitable for liquids and gases that are free of particulate impurities, have low fluid pressure loss, good sealing performance, and high cost. In comparison, ball valves seal better than butterfly valves. The ball valve seal is pressed on the ball surface by the valve seat for a long time. It is sure to wear faster than the hemisphere valve. The ball valve seal is usually made of flexible materials and is difficult to use in high temperature and high pressure pipes. The butterfly valve seal is based on rubber. It has a far worse metal sealing performance than the half ball valve, ball valve and gate valve. After long-term use of the half-ball valve, the valve seat will also have a slight amount of wear, which can be adjusted to continue to be used. The stem and the packing only need to be rotated by 90° during the opening and closing process. When there is a sign of leakage, the pressure of the packing gland is compressed. A little bolt, you can achieve no leakage at the packing, and other valves is still a small leak and strong use, large leakage valve.
In the process of opening and closing, the ball valve is operated under the holding force of the valve seats at both ends. It has larger opening and closing torque than the hemispherical valve. The bigger the nominal diameter is, the more obvious the opening and closing torque difference is, and the opening and closing of the butterfly valve is to overcome the deformation of the rubber. The realization of the moment is greater. The gate valve and globe valve have long operation time and are strenuous.
Ball valve and plug valve are the same type of valve, only its closing part is a ball, the ball rotates around the center line of the valve body to open and close a valve. The ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium.
Butterfly valves are characterized by fast opening and closing speed, simple structure and low cost, but their tightness and pressure bearing capacity are not good. The characteristics of a ball valve are similar to those of a gate valve, but it is difficult to achieve a large diameter because of limitations of volume and opening and closing resistance.
The structural principle of the butterfly valve is particularly suitable for making the butterfly plate of a large-diameter valve butterfly valve installed in the diameter direction of the pipe. In the cylindrical passage of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, the rotation angle is between 0° and 90°, and when the valve rotates to 90°, the valve is fully opened. Its structure is simple, low cost and large adjustable range. Ball valves are generally suitable for liquids and gases that are free of particulate impurities, have low fluid pressure loss, good sealing performance, and high cost. In comparison, ball valves seal better than butterfly valves. The ball valve seal is pressed on the ball surface by the valve seat for a long time. It is sure to wear faster than the hemisphere valve. The ball valve seal is usually made of flexible materials and is difficult to use in high temperature and high pressure pipes. The butterfly valve seal is based on rubber. It has a far worse metal sealing performance than the half ball valve, ball valve and gate valve. After long-term use of the half-ball valve, the valve seat will also have a slight amount of wear, which can be adjusted to continue to be used. The stem and the packing only need to be rotated by 90° during the opening and closing process. When there is a sign of leakage, the pressure of the packing gland is compressed. A little bolt, you can achieve no leakage at the packing, and other valves is still a small leak and strong use, large leakage valve.
In the process of opening and closing, the ball valve is operated under the holding force of the valve seats at both ends. It has larger opening and closing torque than the hemispherical valve. The bigger the nominal diameter is, the more obvious the opening and closing torque difference is, and the opening and closing of the butterfly valve is to overcome the deformation of the rubber. The realization of the moment is greater. The gate valve and globe valve have long operation time and are strenuous.
Ball valve and plug valve are the same type of valve, only its closing part is a ball, the ball rotates around the center line of the valve body to open and close a valve. The ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium.
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